Question

Indicate which of the following will produce a magnetic field:
Check all that apply.
An ordinary piece of iron.
A piece of any metal.
The voltage of a battery not connected to anything.
A moving electric charge.
An electric charge at rest.
An electric current.
A magnet.
The Earth.

Answer 1

a moving electric charge
a magnet
the earth

I think
An electric charge at rest. is also included. I am not sure

Answer 2

I thought it was, ordinary piece of iron, moving electric charge, electric current, magnet and earth

Answer 3

how would electric at rest be included, bc u need electric charge to move to proudce current and if there is no charge moving means no current

Answer 4

www.infoplease.com/encyclopedia/science/electricity-properties-charges-rest.html

Answer 5

isnt that for electricity this is talking about a magnetic field are they the same thing

Answer 6

electromagnetic field?
Oh and Iron is included http://info.ee.surrey.ac.uk/Workshop/advice/coils/mu/

Answer 7

is that the same as magnetic, we learned each one separately..

is it would be iron, magnet, earth and moving charge

the one that says at rest is the opposite of moving though

Answer 8

@agent0smith

Answer 9

A moving electric charge.
An electric current.
A magnet.
The Earth.

these

Answer 10

@AntiNode iron CAN be magnetized, it isn't by default.

Charges at rest don't create fields either.

Answer 11

thanks for the information @agent0smith ...
I was thinking of electron when i was thinking about electron (a charged particle)
my bad

Answer 12

A non-moving electron has no magnetic field

Answer 13

Thank you very much, i thought iron is attracted to magnet

Answer 14

^ it is. As i said "iron CAN be magnetized, it isn't by default. "

Answer 15

ohh oki thank you very much